冲刺2-7

今天将课表 的后台数据库 完善 增删改查 功能实现

package com.example.classpai;

import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Adapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MyClassActivity extends AppCompatActivity implements View.OnTouchListener, GestureDetector.OnGestureListener{

    private SwipeRefreshLayout swipeRefresh;

    private RelativeLayout mLinearLayout;
    private ListView mListView;
    private GestureDetector mGestureDetector;

    private MyDatabaseHelper dbHelper;

    private ClassClassAdapter adapter;

    private List<ClassClass> classList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_class);

//滑动换活动
        findView();


//下拉刷新
        swipeRefresh = findViewById(R.id.refresh);
        swipeRefresh.setColorSchemeResources(R.color.refresh1,R.color.refresh3,R.color.refresh5,R.color.refresh7);
        swipeRefresh.setDistanceToTriggerSync(200);
        swipeRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                refreshClass();
            }
        });

//编辑课表按钮
        Button add_class = findViewById(R.id.add_class);
        add_class.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MyClassActivity.this, AddClass_Activity.class);
                startActivity(intent);
            }
        });
//成绩查询按钮
        Button search = findViewById(R.id.search);
        search.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("http://tiedao.vatuu.com/service/login.html"));
                startActivity(intent);
            }
        });

//数据库读取
        //数据库添加内容
        dbHelper = new MyDatabaseHelper(this,"ClassDatabase.db",null,2);
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        Cursor cursor = db.query("Class",null,null,null,null,null,null);
        if (!cursor.moveToFirst()){
            dataBace_add("1-2");
            dataBace_add("3-4");
            dataBace_add("5-6");
            dataBace_add("7-8");
            dataBace_add("9-10");
        }
        //数据库读取
        dataBace_endlook();
        adapter = new ClassClassAdapter(MyClassActivity.this,R.layout.class_item,classList);
        ListView listView = findViewById(R.id.class_list_item);
        listView.setAdapter(adapter);

    }

//左右滑动函数
//滑动n换活动****************************
//给控件注册OnTouch事件，并且允许响应长点击事件
private void findView() {
    //监听
    mLinearLayout = findViewById(R.id.Layout_my_class);
    mLinearLayout.setOnTouchListener(this);
    mLinearLayout.setLongClickable(true);

    mListView = findViewById(R.id.class_list_item);
    mListView.setOnTouchListener(this);
    mListView.setLongClickable(true);
    mGestureDetector = new GestureDetector(this, this);


}
    //实现手势识别接口中的方法
    //用户按下屏幕就会触发：
    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }
    //短按触摸屏
    @Override
    public void onShowPress(MotionEvent e) {
    }
    //点击屏幕后抬起时触发该事件
    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }
    //在屏幕上拖动控件
    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return false;
    }
    //长按触摸屏
    @Override
    public void onLongPress(MotionEvent e) {

    }
    //滑屏，用户按下触摸屏、快速移动后松开，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE, 1个ACTION_UP触发；       
    //参数分别表示：按下事件、抬起事件、x方向移动速度、y方向移动速度。   
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        final int FLING_MIN_DISTANCE = 100;
        final int FLING_MIN_VELOCITY = 200;
        if (-(e1.getX() - e2.getX()) > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {//左滑
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
            //切换活动时动画
            overridePendingTransition(R.anim.in_from_left, R.anim.out_to_right);
        }
        if ((e1.getX() - e2.getX()) > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY){//右滑
            Intent intent = new Intent(this, AddClass_Activity.class);
            startActivity(intent);
            //切换活动时动画
            overridePendingTransition(R.anim.in_from_right, R.anim.out_to_left);
        }
        return false;
    }
    //实现OnTouchListener接口中的方法
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return mGestureDetector.onTouchEvent(event);
    }

//下拉刷新函数
    private void refreshClass(){

        new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    Thread.sleep(800);
                }catch (InterruptedException e){
                    e.printStackTrace();
                }
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        classList.clear();
                        dataBace_endlook();
                        adapter.notifyDataSetChanged();
                        swipeRefresh.setRefreshing(false);
                        Toast.makeText(MyClassActivity.this,"刷新成功",Toast.LENGTH_SHORT).show();
                    }
                });
            }
        }).start();
    }

//课表显示函数
    private void dataBace_look(String time){
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        String strings[]  = new String[14];
        int n = 0;
        Cursor cursor = db.query("Class",new String []{"name","room"},"time = ?",new String []{time},null,null,null);
        if (cursor.moveToFirst()){
            do {
                strings[n] = cursor.getString(cursor.getColumnIndex("name"));
                n++;
                strings[n] = cursor.getString(cursor.getColumnIndex("room"));
                n++;
            }while (cursor.moveToNext());
            cursor.close();
            initRedString(time,strings);
        }
    }
    private void dataBace_endlook(){
        dataBace_look("1-2");
        dataBace_look("3-4");
        dataBace_look("5-6");
        dataBace_look("7-8");
        dataBace_look("9-10");
    }
//数组添加课表信息函数
    private void initRedString(String time,String[] strings){
        ClassClass message = new ClassClass(time,strings[0]+ "
" + strings[1],strings[2]+ "
" + strings[3],strings[4]+ "
" + strings[5],strings[6]+ "
" + strings[7],strings[8]+ "
" + strings[9],strings[10]+ "
" + strings[11],strings[12]+ "
" + strings[13]);
        classList.add(message);
    }

//数据库添加函数
    private void dataBace_add(String time){
        SQLiteDatabase db = dbHelper.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("day","星期一");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期二");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期三");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期四");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期五");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期六");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
        values.put("day","星期日");
        values.put("time",time);
        values.put("name","课程名称");
        values.put("room","教室");
        db.insert("Class",null,values);
        values.clear();
    }
}
Addclass_Activity.java

package com.example.classpai;

import android.content.ContentValues;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.RelativeLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class AddClass_Activity extends AppCompatActivity implements View.OnTouchListener, GestureDetector.OnGestureListener{

    private MyDatabaseHelper dbHelper;

    private RelativeLayout mLinearLayout;
    private GestureDetector mGestureDetector;

//滑动n换活动****************************
//给控件注册OnTouch事件，并且允许响应长点击事件
    private void findView() {
        mLinearLayout = findViewById(R.id.Layout_add_class);
        mLinearLayout.setOnTouchListener(this);
        mLinearLayout.setLongClickable(true);
        mGestureDetector = new GestureDetector(this, this);
    }
//实现手势识别接口中的方法
    //用户按下屏幕就会触发：
    @Override
    public boolean onDown(MotionEvent e) {
        return false;
    }
    //短按触摸屏
    @Override
    public void onShowPress(MotionEvent e) {
    }
    //点击屏幕后抬起时触发该事件
    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        return false;
    }
    //在屏幕上拖动控件
    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        return false;
    }
    //长按触摸屏
    @Override
    public void onLongPress(MotionEvent e) {

    }
    //滑屏，用户按下触摸屏、快速移动后松开，由1个MotionEvent ACTION_DOWN, 多个ACTION_MOVE, 1个       
    // ACTION_UP触发；参数分别表示：按下事件、抬起事件、x方向移动速度、y方向移动速度。   
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        final int FLING_MIN_DISTANCE = 100;
        final int FLING_MIN_VELOCITY = 200;
        if (-(e1.getX() - e2.getX()) > FLING_MIN_DISTANCE && Math.abs(velocityX) > FLING_MIN_VELOCITY) {//左滑右滑皆可
        Intent intent = new Intent(this, MyClassActivity.class);
        startActivity(intent);
        //切换活动时动画
        overridePendingTransition(R.anim.in_from_left, R.anim.out_to_right);
        }
        return false;
    }
    //实现OnTouchListener接口中的方法
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return mGestureDetector.onTouchEvent(event);
    }



//主程序***********************************
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_class_);

        findView();

        dbHelper = new MyDatabaseHelper(this,"ClassDatabase.db",null,2);

        Button button_add = findViewById(R.id.add);
        final Spinner spinner_day = findViewById(R.id.add_day);
        final Spinner spinner_time = findViewById(R.id.add_time);
        final EditText editText_name = findViewById(R.id.add_name);
        final EditText editText_room = findViewById(R.id.add_room);
        final TextView textView_spinner1 = findViewById(R.id.text_spinner1);
        final TextView textView_spinner2 = findViewById(R.id.text_spinner2);

        //获取spinner中的内容（先转到TextView中）
        spinner_day.setOnItemSelectedListener(new OnItemSelectedListener() {
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                //拿到被选择项的值
                String string_day = (String) spinner_day.getSelectedItem();
                textView_spinner1.setText("");
                textView_spinner1.setText(string_day);
            }
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
        spinner_time.setOnItemSelectedListener(new OnItemSelectedListener() {
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                //拿到被选择项的值
                String string_time = (String) spinner_time.getSelectedItem();
                textView_spinner2.setText("");
                textView_spinner2.setText(string_time);
            }
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });

//按钮保存事件
        button_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String string_day = textView_spinner1.getText().toString();
                String string_time = textView_spinner2.getText().toString();
                String string_name = editText_name.getText().toString();
                String string_room = editText_room.getText().toString();

                SQLiteDatabase db = dbHelper.getWritableDatabase();

                ContentValues values = new ContentValues();
                values.put("name",string_name);
                values.put("room",string_room);
                //修改
                db.update("Class",values,"day = ? and time = ?",new String []{string_day,string_time});
                values.clear();

                Toast.makeText(AddClass_Activity.this,"编辑成功",Toast.LENGTH_SHORT).show();
            }
        });
    }
}